Question What is the name of this type of heat sink mount that's soldered on with 4 pins ?

[reaper89971]

https://imgur.com/gxChvC9

View: https://imgur.com/gxChvC9


I found these strange heat sinks on smart tvs and was wondering what type of heat sink they are.

They have 4 pins that solder into the board. What is the name of that type of mounting.

I want to find a better replacement but i don't know what type of heat sink this is?

Or what is the name of that type of heat sink mounting system?

https://imgur.com/yTMa2Ax

View: https://imgur.com/yTMa2Ax

 

[Aeacus]

What is the name of that type of mounting.

Unsure if it even has dedicated name, since everything that is soldered on, isn't meant to be replaced.

But in electronics world (namely CPUs), closest to what you have, can be called BGA (ball grid array).
BGA CPUs/chips are soldered directly to PCB, just like your heat spreader is.
Further reading: https://en.wikipedia.org/wiki/Ball_grid_array

 

[reaper89971]

Unsure if it even has dedicated name, since everything that is soldered on, isn't meant to be replaced.

But in electronics world (namely CPUs), closest to what you have, can be called BGA (ball grid array).
BGA CPUs/chips are soldered directly to PCB, just like your heat spreader is.
Further reading: https://en.wikipedia.org/wiki/Ball_grid_array

Thanks for your reply
That is a bummer that there isn't a name for that type of heat sink.

I was hoping something better were out there i could replace it with.

In my opinion its not a very good heat sink.

So i took a regular heat sink and thermal glued it to there heat sink essentially making a double heat sink or a bigger heat sink. I also replaced the thermal paste with Noctua Thermal paste. I Cut a hole in the back of the TV and added a fan as well.

There is a power upgrade switch or plug on the board that produces 12volts, Im going to try to run the fan off that. This is A ACER smart tv from India.

I recapped the motherboard with LOW ESR capacitors and added a emi filter plug. Hoping to make this TV last alot longer and run more efficient.

 

[RAIDGoblin]

So i took a regular heat sink and thermal glued it to there heat sink essentially making a double heat sink or a bigger heat sink. I also replaced the thermal paste with Noctua Thermal paste. I Cut a hole in the back of the TV and added a fan as well.

There is a power upgrade switch or plug on the board that produces 12volts, Im going to try to run the fan off that. This is A ACER smart tv from India.

probably no specific replacement you can find, those things are usually made and designed for a specific PCB, but in my experience with music equipment replacing thermal compound with high end compound designed for PC's, like you have done, can yield very good results, these things are built with "heat sink compound", like what goes between a power transistor and a heat spreader, those compounds are very very low quality

this sort of thing is what's normally used on a general electronics production line:
https://uk.rs-online.com/web/p/thermal-grease/0554311?gb=s
several years ago I built a PC up with this just to see how bad it really was, I had a CPU that with arctic paste idled at 35-40, instead idled at 55-60, it was insanely bad, running 20 degrees hotter

other than the improvement you'll already have from improving the compound and air flow, you can get stuff like this that you might be able to stick on top of the soldered heat spreader you have:
https://www.scan.co.uk/products/xcl...eed_clicks&utm_content=surfaces_across_google

I recapped the motherboard with LOW ESR capacitors and added a emi filter plug. Hoping to make this TV last alot longer and run more efficient.

consumer electronics is cheap and designed to live only a few years these days, seeing if you can improve that sounds like a great electronics project, good luck with it

 

[Aeacus]

seeing if you can improve that sounds like a great electronics project, good luck with it

In today's day and age, essentially every piece of consumer electronics can be improved upon, especially when it is low-end/cheap to begin with.
But why it is cheap, comes down to manufacturing cost. Sure, manufacturer can make a better product, but that takes more time and/or better components - which in turn increase the final retail price. And not everyone want or even can afford to buy good products. Hence why there is a HUGE market for cheap products. Since when no-one would be buying the cheap and poor products, manufacturers wouldn't even make them (pointless to spend time, money and resources for a product that no-one isn't going to buy).

In my opinion its not a very good heat sink.

It isn't a heat sink to begin with. Heat sink has fins for better cooling. What you have there, is heat spreader, which can also be called as cold plate.

But i do agree with RAIDGoblin, that the one you have, is custom made for that specific TV.

This is A ACER smart tv from India.

Did look a bit more into those TVs and they are not official Acer TVs.
What you have, is probably one of these?
Lineup: https://acertvindia.com/product/

If so, the Indkal Technologies Private Limited is just paying Acer to use their name and trademark with the TVs the Indkal is producing.
So, best to contact Indkal and ask them about further info, since at the end of the day, they made it. Acer name is just on the TVs for marketing purpose. (Better to sell products with known name on them, like Acer, rather than unknown name, like Indkal.)

 

[Grobe]

It's as simple as you have a bent sheet with four mounting holes, without ribbons. Nothing more - that's it. The only other piece of text may be including the device it belong to.

 

[reaper89971]

probably no specific replacement you can find, those things are usually made and designed for a specific PCB, but in my experience with music equipment replacing thermal compound with high end compound designed for PC's, like you have done, can yield very good results, these things are built with "heat sink compound", like what goes between a power transistor and a heat spreader, those compounds are very very low quality

this sort of thing is what's normally used on a general electronics production line:
https://uk.rs-online.com/web/p/thermal-grease/0554311?gb=s
several years ago I built a PC up with this just to see how bad it really was, I had a CPU that with arctic paste idled at 35-40, instead idled at 55-60, it was insanely bad, running 20 degrees hotter

other than the improvement you'll already have from improving the compound and air flow, you can get stuff like this that you might be able to stick on top of the soldered heat spreader you have:
https://www.scan.co.uk/products/xcl...eed_clicks&utm_content=surfaces_across_google


consumer electronics is cheap and designed to live only a few years these days, seeing if you can improve that sounds like a great electronics project, good luck with it

Thanks for your reply
Should the added cooling fan blow in or out for a smart tv?

The motherboard is an all in one board meaning the power supply is on the board. So it has a transformer on the board. I cut a center hole for a desktop fan 92mm .

 

[RAIDGoblin]

Thanks for your reply
Should the added cooling fan blow in or out for a smart tv?

The motherboard is an all in one board meaning the power supply is on the board. So it has a transformer on the board. I cut a center hole for a desktop fan 92mm .

no problem,

usually it would blow in, fresh air over the heat spreader etc... but you would need a grill or hole or something somewhere else for the air that's drawn in to leave through

 

[reaper89971]

Here is a photo of the board

https://imgur.com/SOv1rji

View: https://imgur.com/SOv1rji

https://imgur.com/5zfLkNw

View: https://imgur.com/5zfLkNw

https://imgur.com/FlTyG7f

View: https://imgur.com/FlTyG7f

https://imgur.com/aNCfhoR

View: https://imgur.com/aNCfhoR

https://imgur.com/KW3Axiy

View: https://imgur.com/KW3Axiy

 

[RAIDGoblin]

Here is a photo of the board

https://imgur.com/SOv1rji

View: https://imgur.com/SOv1rji

yeah, blowing fresh air down onto that heat-sink would probably be most effective

 

[Aeacus]

Here is a photo of the board

Current setup is sucking air out from the TV since you can see fan hub frame and that is the exhaust part of the fan.

This creates negative pressure inside the housing and in terms of cooling, is best. Downside is that air is sucked in from all the gaps the TV has, and with air, dust as well.

If you were to flip the fan around, it then pushes the air in, creating positive pressure. And if you could somehow put a dust filter in front of the fan, you can eliminate dust buildup in there. Downside is that positive pressure isn't as good in cooling as negative pressure is and it can also lead to hotspots.